#ifndef ETHERLIB_TEST_TIMER_H
#define ETHERLIB_TEST_TIMER_H

#include <stdint.h>

/**
 * A single point in time
 */
typedef struct {
    uint32_t s; ///< Seconds
    uint32_t ns; ///< Nanoseconds
} TimePoint;


struct Timer_;

typedef union {
    void * ptr;
    uint32_t u;
} AlarmUserData;

typedef void (*TimerAlarmCb)(struct Timer_ * timer, AlarmUserData user);

typedef struct {
    TimePoint time; ///< Alarm time
    TimerAlarmCb cb; ///< Pointer to callback function
    AlarmUserData params; ///< User data passed to callback function
} AlarmAssignment;

/**
 * Timer class
 */
typedef struct Timer_ {
    TimePoint time; ///< Absolute time
    AlarmAssignment * nextAlarm; ///< Nearest alarm
    uint32_t maxSched; ///< Maximum number of scheduled alarms
    uint32_t nSched; ///< Number of scheduled alarms
    AlarmAssignment alarms[]; ///< Alarm assigment pool
} Timer;

/**
 * Create new timer
 * @param maxSched number of maximum alarms to be scheduled
 * @return pointer to new instance OR NULL on error
 */
Timer * timer_new(uint32_t maxSched);



#endif //ETHERLIB_TEST_TIMER_H